Nuclear decontamination device and a method of decontaminating radioactive materials

a nuclear decontamination and radioactive material technology, applied in the direction of radioactive decontamination, cleaning process and apparatus, liquid cleaning, etc., can solve the problems of difficult to efficiently decontaminate an actual radioactive object sample, low decontamination efficiency, and almost no effect, so as to achieve efficient decontamination of polluted object samples.

Inactive Publication Date: 2010-10-28
MINEHARA EISUKE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0030]Because the invention is consisted as above-mentioned already, the nuclear deco...

Problems solved by technology

However, whenever the decontamination processing on stainless steel using the same laser was done on the same condition of the carbon steel, the decontamination efficiency was reported to be extremely low, almost no effect, and insufficient in the above-m...

Method used

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  • Nuclear decontamination device and a method of decontaminating radioactive materials
  • Nuclear decontamination device and a method of decontaminating radioactive materials
  • Nuclear decontamination device and a method of decontaminating radioactive materials

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Embodiment Construction

[0034]It explains the nuclear decontamination device and method that lies in the form of practicing this invention as follows. FIG. 1 shows the composition of the decontamination device that lies in the form and actual situation of practicing this invention.

[0035]The nuclear decontamination of the decontamination object sample (20) is done especially efficiently with the decontamination device. In the nuclear decontamination device, the laser light irradiates the surface (20) of the decontamination object sample by the laser light source (11). The laser light reaches the surface (20) of the decontamination object sample through the condensing optics system (12). The laser light source (11) and condensing optics system (12) are adjusted by controller part (13).

[0036]For instance, the laser light source (11) is a flash lamp excitation type Nd:YAG laser, and, oscillates at the wavelength of 1064 nm. The laser light oscillates in pulses, and the irradiation energy of the pulse and each ...

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Abstract

This is an efficient nuclear decontamination device using the laser light to remove the radioactive substance from the polluted parts of the radioactive object sample in the nuclear devices and facilities. In the nuclear decontamination device, the laser source (11) of the oscillator and amplifier system is used to irradiate on the surface (20) of the decontamination object sample through the condensing optics (12). The controller (13) optimizes the laser energy density on the surface by using both of the laser sources (11) and condensing optics (12). In the optimization, the energy density per pulse is controlled by optics system (12) of condensing within the range of 1 J/cm2-1000 J/cm2 in the surface of the decontamination object sample (20). Minimum beam spot size and Rayleigh length are chosen to keep the energy density per pulse in the above-mentioned range of the energy density.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]This invention relates to a nuclear decontamination device and a method of removing radioactive substances on the surface of an object to be decontaminated, the surface of the object being polluted with the radioactive substances.[0003]2. Description of the Related Art[0004]At dismantlement, abandonment, and the regular maintenance of the nuclear devices and facilities like nuclear reactors and accelerators (hereinafter, the accelerators and similar ones) that generate a strong radiation, it is mandatory to abandon the material polluted with the radioactive substance. Whenever the polluted parts of the nuclear devices and facilities are dismantled and abandoned, it is mandatory to abandon it after the radioactive substance such as 60Co (contaminant) and other radioisotopes have to be removed from the parts. A number of methods of the nuclear decontamination have been well known to remove the radioactive substance from t...

Claims

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Application Information

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IPC IPC(8): G21F9/00B08B7/00
CPCB08B7/0042G21F9/28G21F9/005
Inventor MINEHARA, EISUKE
Owner MINEHARA EISUKE
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